[Dnsmasq-discuss] dhcp-option 0.0.0.0 address interpretation possible bug?

Simon Kelley simon at thekelleys.org.uk
Thu Sep 10 22:13:08 BST 2015


On 10/09/15 10:39, Kevin Darbyshire-Bryant wrote:
> Hi All,
> 
> dnsmasq 2.75
> 
> Putting 'dhcp-option=ntp-server,0.0.0.0' in dnsmasq.conf is throwing an
> error "bad dhcp-option at line 73 of /etc/dnsmasq.conf"  Replacing it
> with 'dhcp-option=42,0.0.0.0' allows dnsmasq to start and behave
> properly.  I've noticed similar behaviour with 'netbios-ns' (option 44) 
> The manpage states "special address 0.0.0.0 is taken to mean the address
> of the machine running dnsmasq".
> 
> dhcpv6 options don't throw an error when using text versions of dhcpv6
> options and special addresses (::, fe80::, fd00::) so I assume they're
> okay but haven't checked the addresses contained in dhcpv6 replies yet.
> 
> I'm adopting my usual stance of assuming I'm an idiot and doing
> something wrong....await education :-)


You've got the syntax wrong, it should be

dhcp-option=option:ntp-server,0.0.0.0


Cheers,

Simon.


> 
> Kevin
> 
> 
> 
> 
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